Gas-burner.



C. K. ERIKSTRUP.

GAS BURNER.

APPLICATION FILED JAN. 8, l9l8. 1,291,814. Patented Jan. 21, 1919.

26 la 20 Z7 20 W/ T/vEs 3E5, INVENTOI? nnrrnn STATES PATENT onnion.

CHRISTEN K. ERIKSTRUP, F MINNEAPOLIS, MINNESOTA.

GAS-BURNER.

me e

' To all whom it may concern:

: pertains to {Be it known that I, CHRISTEN K. ERIK- sTRUP, a'subject of the King of Denmark, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements .in Gas-Burners; and I do hereby declare the following to" be a full, clear, and exact description' of the invention, such as will enable othersskilled in-the art to which it apmake and use the same.

3 My invention has for its object to provide an improved as burner especially adapted for use on coo ring stoves, and to such ends, generally. stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims. r

The invention involves a'novel arrange ment of air heating chamber whereby the air quite high temperature heforeit is commlngled with the gas; and

. trate .the invention in the invention further involves the arrangement of a pilot burner.

i In the acompanying drawings which illusits preferred form, like characters indicate like parts throughout the several views. V

Referring to the drawings: ,Figure 1 is a plan view of the complete bu'rner;.' f

-.Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1;-and i ,,Fig. ,3 is a fragmentary view in vertical section showing the top plate or diaphragm of the air preheating chamber.

The air preheating chamber, as preferably constructed is made up of a cylindrical side wall 4, a bottom plate 5, and a top plate or diaphragm 6. The bottom plate 5 has an upturned marginal flange formed with the air intake ports 7 The cylindrical wall 4 has an outwardly flaring flange 8 that rests upon the upturned marginal flange of the bottom plate The wall 4 near its up outwardly pressed head 9 and the top plate 6 is arranged to telescope over the extreme upper edge of the said wall plate and torest upon the bead 9.

U The top plate 6 isformed with concentric corrugations that increase the radiating surface thereof, and at its central portion it is provided with a depressed cup 10 that is slightly -telescoped i tothe upper end of an outer tube 11. In its walls the cup 10 has circilmferentlally spaced My a .a p ssages 12.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application filed January 8, 1918. Serial No. 210,834.

At its lower end the outer tube 11 is screwed into a tubular coupling head 13, the lower end of which is closed by a screw-threaded plug 14. V The plug 14 is passed through an axial perforation in the bottom plate 5, and it has a projecting flange that clamps the adjacent central portion of said bottom plate against'the lower end of the coupling sleeve 13, thereby rigidly supporting the said sleeve 13 and tube 11. At one side the sleeve 13 has a projecting hub 15 into which the inner end of a radial gas pipe 16 is screwed. This gas pipe 16 extends through one side of the wall 4 and is adapted to be connectedto a rubber hose, or to be cone nected otherwise to amain gas supply pipe.

Loosely resting on the upper portion 0 the cup 10 is a deflecting cap 17. This deflecting cap 17 at its rim has circumferem tially spaced rest lugs 18 that bear upon the upper portion of the cup 10 and space the rim of said cap from the upper portion of said cup so as to permit the lateral and upward escape of the commingled-air and gas, as indicated by arrows marked on Fig. 2. Resting upon the flanged rim of the top plate 6 is a metal ring 19 that is provided with inwardly projecting radial griddle supporting arms 20. These griddle supporting arms 20 terminate short of the deflecting cap 17 and preferably they are tied together by loops 21 cast integral therewith.

Working axially through deflecting cap 17, cup 10, outer tube 11, and coupling sleeve 13 is a small inner gas tube 22 that constitutes a portion of the pilot burner and serves as a valve stem. The lower end of this tube 22 is seated for vertical movement in an axial seat formed in the plug 14. Within the coupling sleeve 13, tube 22 is provided with a conical valve 23 which under the action of a light coiled spring 24 normally closes a port 25 formed in said sleeve. The spring 24 reacts against the plug 14 and against said valve. Below the valve 23, tube 22 is formed with a small gas port 26. Secured to the upper end ofthe tube 22 is a small, transversely extended horizontal tubular head 27 preferably closed at one end and provided at its other end with a very small gas discharge port 28.

The operation of the burner is substantially as follows: -When there is no cooking utensil on the griddle support, or skeleton, the spring 24 will cause valve 23 to close port were we S er ear he P noted that there is sufficient hot when it chamber Will cut off; but there will be a small supply of gas through port 26, tube 22, head 27, and port 28 which will support a small gasfiam'e that Will serve as a pilot for starting the main gas flame Whenever the head 27, tube 22, and valve 23 are depressed. This depressing of the said parts 27, 22, and 23 Will take place Whenever a cooking utensil is placed upon the griddle support. Here it Will be noted that normally the upper portion of'the head 27 is above the upper sur-' face of the griddle support; It will, also be clearance be tween the inner tube 22 and-the outer tube 11 to" permit the desired flow of gas for the inain-flame.-- I

When themain burner is inaction, the metal parts of the air chamber .Which' is made-up of the bottomplate 5, side plate'c, andtop plate 6 will'get quite hot sothat the air that is drawn in through'the'ports 7 Will be preheated, The hot air from the said pass through the openings 12 of the cup 10 andwill thereco'mmingle with the gas which is deliveredupward into said cup'through the" annular passage between the tubes 11 and 22. Inasmuch as the air is is thus l commingled with" the gas, the commingling Will be more complete and the resulting combustion'will produce a hotter flame thanwhen cold air is used as is customary. The commingling hot air" and gaswill strike against the undersurface oi the deflecting'cap 17, and-being spread' in all radial directions therebywvill escape through the passage between theouter edge of said capand the uppermos'tportion. of the cup 10,

' an'dwill be ignited by the pilot" light which constantly" burns atthe' small gas escape passage 28;

When a griddle, kettle, or other cooking utensil iso'nthe griddle support, theflames w ll strikeagainst the bottom thereof, and Will be deflected radially outward through the space, or combustion chamber proper which is'between the bottom o'fsuch utensil and the upper surfacebfthe top plate 6.

he top plate, therefore, Will" be made very hot and, consequently, the air" cominginto contact with the under surface of the said top plate before it is c'ommingled with the gas, will be made very'hot and,in'fact,' will be brought nearly or'quite toth'e flashing" point of the gas before it'iscommingled with'the gas; This, as is obvious,flpro'duces the most intense combustion that it isjpossi v ble't'o' produce \vi'tlithe gas employed The gas may be ordinarycity gas,"natural gas, or hydrocarbon vapor produced from gasole'ne or kerosene.

'What'I claim is: 1. A; gas'burningf device comprising a utensil supporting, skeleton anair' preheat ing" chamber havingai top! platelocated im I mediately' below- -saidisapportingskeletong a l a; deflecting cap glingchambe'r, a es supply tube depending from said commingling I utensil supporting" skeleton supported inrmedia'te'ly'aboves'aid top plate.

3. A gas burning device comprisinga'rr airpreheating chamber 'havlng'bottbm, sideand top plates, said top'plate having" a cup; like 'commingling-chamber located at its central portion and rovided with openingsj the upper portion of said" adeflecting cap connecting it to air preheating, chamber, overlying but s aced from said com'min? gling chamber, a" gassupplytubedepend mg from said commingling chamber, anda utensil supporting, skeleton" supported imchamber, and Y a mediately' above said top plate, the said" top" plate being corrugated and the said cup-like; commingling chamberbeing formed" interg'ral therewith;

4. A gas burning de'vice" comprising an" air preheating cliamberhaving bottom; side and" top plates, saidtop plate having a cup like commingling chamber located at its central portion and. provided With"openings connecting it to theupper'portion of said overlying but spaced from said conrimin gling chamber,

utensil supporting skeleton supported inn me'diately above sai d'topplate, the-said de fleeting cap being below the'upper'sur'face of said supporting skeleton;

gas burning device: comprising an" fleeting ca'ooverlying but spaced frornsaid comminglin'g chamber, and a" utensil sup; porting skeleton supported immediately,

a gas supply. tube depe d- 7 ing from said comminglin"gchamber. and:

above, said" top plate, a yieldingly pressed valvenormally closing the passage through 7 said gas'tu e. said valve having a stem" normallv projecting above the upper surface of said supporting skeleton;

6. A; as bu 'ing device comprising; an preheatingcham erhavin'g bott m, side and top" plates, said'top-plate" having-a" cup:

like commingling chamber located at its central portion and provided with openings connecting it to the upper portion of said air preheating chamber, a gas supply tube leading to said commingling chamber, a deflecting cap overlying but spaced from said commingling chamber, and a utensil supporting skeleton supported immediately above said top plate, a yieldingly pressed valve normallyrclosin the passage through said gas tube, js'aid va ve having a stem normally projecting above the upper surface of said supporting skeleton, the said valve stem being in the form of a tube provided at its lower portion with a port in communi- 15 cation with the gas supply, and provided at its upper-end with a head having a small gas escape passage affording a pilot light.

In testimony whereof I afiix my signature in presence of, two witnesses.

I GHRISTEN K. ERIKSTRUP. Witnesses:

CLARA Bummer, B. 'G. BAUMANN.

copies of this patent may be obtained to: an cent: each, by addressing the Gemstone: o1 hunts.

' 'uhinghn l.0. 

